154 lines
5.2 KiB
C++
154 lines
5.2 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper165 Fire Emblem Chinese version //
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//////////////////////////////////////////////////////////////////////////
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void Mapper165::Reset()
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{
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for( INT i = 0; i < 8; i++ ) {
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reg[i] = 0x00;
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}
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prg0 = 0;
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prg1 = 1;
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SetBank_CPU();
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chr0 = 0;
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chr1 = 0;
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chr2 = 4;
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chr3 = 4;
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latch = 0xFD;
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SetBank_PPU();
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we_sram = 0; // Disable
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nes->ppu->SetChrLatchMode( TRUE );
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}
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void Mapper165::Write( WORD addr, BYTE data )
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{
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switch( addr & 0xE001 ) {
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case 0x8000:
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reg[0] = data;
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SetBank_CPU();
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SetBank_PPU();
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break;
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case 0x8001:
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reg[1] = data;
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switch( reg[0] & 0x07 ) {
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case 0x00:
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chr0 = data & 0xFC;
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if( latch == 0xFD )
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SetBank_PPU();
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break;
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case 0x01:
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chr1 = data & 0xFC;
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if( latch == 0xFE )
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SetBank_PPU();
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break;
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case 0x02:
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chr2 = data & 0xFC;
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if( latch == 0xFD )
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SetBank_PPU();
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break;
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case 0x04:
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chr3 = data & 0xFC;
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if( latch == 0xFE )
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SetBank_PPU();
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break;
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case 0x06:
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prg0 = data;
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SetBank_CPU();
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break;
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case 0x07:
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prg1 = data;
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SetBank_CPU();
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break;
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}
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break;
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case 0xA000:
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reg[2] = data;
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if( data & 0x01 )
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{
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SetVRAM_Mirror( VRAM_HMIRROR );
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}else{
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SetVRAM_Mirror( VRAM_VMIRROR );
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}
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break;
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case 0xA001:
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reg[3] = data;
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break;
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default:
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break;
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}
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}
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void Mapper165::SetBank_CPU()
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{
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SetPROM_32K_Bank( prg0, prg1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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}
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void Mapper165::SetBank_PPU()
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{
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if(latch==0xFD){
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SetBank_PPUSUB( 0, chr0 );
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SetBank_PPUSUB( 4, chr2 );
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}else{
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SetBank_PPUSUB( 0, chr1 );
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SetBank_PPUSUB( 4, chr3 );
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}
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}
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void Mapper165::SetBank_PPUSUB( int bank, int page )
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{
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if( page == 0 ) {
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SetCRAM_4K_Bank( bank, page>>2 );
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} else {
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SetVROM_4K_Bank( bank, page>>2 );
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}
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}
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void Mapper165::PPU_ChrLatch( WORD addr )
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{
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WORD mask = addr&0x1FF0;
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if( mask == 0x1FD0 ) {
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latch = 0xFD;
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SetBank_PPU();
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} else if( mask == 0x1FE0 ) {
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latch = 0xFE;
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SetBank_PPU();
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}
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}
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void Mapper165::SaveState( LPBYTE p )
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{
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for( INT i = 0; i < 8; i++ ) {
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p[i] = reg[i];
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}
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p[ 8] = prg0;
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p[ 9] = prg1;
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p[10] = chr0;
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p[11] = chr1;
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p[12] = chr2;
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p[13] = chr3;
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p[14] = latch;
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}
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void Mapper165::LoadState( LPBYTE p )
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{
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for( INT i = 0; i < 8; i++ ) {
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reg[i] = p[i];
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}
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prg0 = p[ 8];
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prg1 = p[ 9];
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chr0 = p[10];
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chr1 = p[11];
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chr2 = p[12];
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chr3 = p[13];
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latch = p[14];
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}
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